Floodlight reflector assembly



Filed July 27, 1967 INVENTOR. 7 4 2- e wstm.

United States Patent 3,476,925 FLOODLIGHT REFLECTOR ASSEMBLY Tarek Adra,La Canada, Califl, assignor to Harvey Hubbell, Incorporated, Bridgeport,Conn., a corporation of Connecticut Filed July 27, 1967, Ser. No.656,417 Int. Cl. F21p /00; F21s 1/10, 3/10 US. Cl. 240-3 4 ClaimsABSTRACT OF THE DISCLOSURE A floodlight reflector assembly having asupport means and a trunnion ring carried by the support means. Thetrunnion ring has an inwardly extending circumferential flangeterminating in an annular lip. A reflector, having complementarycircumferential flanges, is mated with the trunnion ring and an axiallyextending collar is formed over the trunnion ring lip. The trunnion ringhas an aperture formed in it and a cooperating formation is carried bythe reflector to position the reflector with respect to the trunnionring.

BACKGROUND OF THE INVENTION This invention relates to a floodlightreflector assembly and, more particularly, to the manner in which thereflector may be fastened to the usual trunnion ring.

The usual floodlight construction includes a socket housing whichreceives a flood lamp and to which is secured a reflector. The reflectoris formed with a suitable curvature for accurately focusing the rays oflight emanating from the light source and for accurately aiming them atan object while confining the light within a usable beam. Thus, thereflectors are usually constructed in a generally conoidal shape havingvarious portions of different curvature for intercepting and directingthe rays. When coupling the usual reflector with the usual sockethousing it is necessary that the reflector be rigidly secured theretoand accurately positioned so that the entire floodlight assembly may beproperly aimed.

Heretofore, several different methods have been utilized in the priorart to couple the reflector to the socket housing. Each, however,requires auxiliary hardware which increases both manufacturing andassembly costs. One such known construction utilizes a plurality ofcircumferentially spaced screws for securing a reflector flange to asocket housing or to a trunnion ring and positioning it relativethereto. Another known coupling ar- 'rangement comprises a plurality ofcircumferentially spaced latches which allow the reflector to be hungupon the socket housing. Another common arrangement includes a clampingring which is threadedly engageable with a socket housing or trunnionring for urging a usual radial flange of the reflector against thehousing or ring and thereby clamping the reflector in place.

Each of these above described prior art coupling arrangements removablysecures the reflector and includes a plurality of auxiliary parts, thusincreasing the costs of manufacture and assembly of the floodlightreflector and housing. Furthermore, each time the reflector is coupled,there is the possibility that it will be mounted improperly relative tothe socket housing thereby disturbing the required accurate aim of thefloodlight.

SUMMARY OF THE INVENTION Accordingly, it is the primary object of myinvention to provide an improved floodlight reflector assembly in whichthe reflector and the trunnion ring are permanently coupled and areaccurately positioned relative to one another.

A further object is to provide an economical floodlight ice reflectorassembly which does not require auxiliary securing means for couplingthe reflector with the trunnion ring and which may be easily assembled.

To accomplish these objects, in one form, a floodlight reflectorassembly is provided which comprises: a support bracket; a trunnion ringrotatably mounted on the bracket; aiming means on the ring and bracketfor selectively angularly positioning the ring relative to the bracket;a socket housing removably coupled to the ring for supporting afloodlight; and a reflector having a complex reflective surfaceincluding plural sections having different curvatures, the reflectorbeing permanently secured to the mounting ring for being accuratelyaimed in response to the selective positioning of the mounting ring.

BRIEF DESCRIPTION OF THE DRAWINGS Other objects and further details ofthat which I be-.

lieve to be novel and my invention will be clear from the followingdescription and claims taken with the accompanying drawing, wherein:

FIG. 1 is a side elevational view of the floodlight reflector assemblypartially broken away to show the manner in which the reflector issecured to the trunnion ring and to show the lens door construction;

FIG. 2 is an enlarged cross sectional elevational view taken through thecenter of the reflector showing the reflector construction prior tobeing coupled with the trunnion ring; and

FIG. 3 is an enlarged cross-sectional elevational view taken through thecenter of the coupled reflector and trunnion ring.

DESCRIPTION OF THE PREFERRED EMBODIMENT There is illustrated in FIG. 1 afloodlight assembly which includes a reflector 10 constructed of spunaluminum or other suitable material, a cylindrical trunnion ring 12supported for rotation on a U-shaped bracket 14, the ring beingpermanently coupled at one end to the reflector 10 and removably securedat its other end to a socket housing 16 which carries a floodlamp 18. Alens door 20 is hingedly secured to the flared end of the reflector forpreventing entry of dirt, water or other foreign objects which mayimpair the reflective surface.

More particularly, the reflector 10 comprises a conoid including severalsections, each having a specific curvature for intercepting light raysfrom a source and for directing the rays into a coherent beam for beingaimed at a target. The sections of various curvature are accurately spunin a known manner. The largest section 10a is substantially paraboloidaland is formed at its outer or flared end with an S-shaped lip 10b and atits other end merges into a spherical section 10c which in turn mergesinto a smaller curved section 10d which closes the end of the reflector.A coupling section 22 defining an opening is provided through thesections and 10a, the axis of which forms an angle of approximately 50to the longitudinal axis of sections 10a, 10c and 10d.

The coupling section 22 is shown clearly in FIG. 2 as it is formed priorto being permanently coupled with the trunnion ring 12. It comprises anannular axially extending collar 24 which terminates in an annularangularly inwardly directed flange 26, which in turn terminates in anannular, reduced diameter axially extending collar 28. A sphericalprotrusion 30 drawn from the flange wall is formed as a positioningdevice for insuring that the reflector 10 is properly located relativeto the trunnion ring 12.

The trunnion ring 12 may be formed of cast aluminum and includes agenerally cylindrical outer wall 32 which may be provided with suitablereinforcing ribs 34. At one end of the wall 32, there is located anannular angularly inwardly directed flange 36 having the same angle asthe reflector flange 26. Flange 36 includes an aperture 38 therethroughand terminates in an annular axially extending lip 40 having a smoothlycurved surface.

When assembling the floodlight the reflector 10 is first mated with thetrunnion ring 12 with the collar 28 extending into the central openingof the trunnion ring and is rotated until the protrusion 30 isintroduced into the aperture 38 thus indicating that the members 10 and12 are properly positioned relative to one another. The collar 28 maythen be rolled over the lip 40 in a known manner, as clearly illustratedin FIG. 3.

The trunnion ring further includes a radially outwardly extending flange42 located at the end of the wall 32 remote from the flange 36 to whichthe socket housing 14 may be secured in any suitable manner. Thestandard fioodlamp 18 is received in a usual lamp receiving socketmounted in the socket housing 16, and is connected to a power source bypower cord 44. The cord 44 passes into the housing 16 through a sealingbushing assembly 46 of usual construction which prevents entry offoreign matter into the housing.

Lens door 20 located at the enlarged flared end of the reflector 10which is hingedly secured to the reflector comprises an annular frame 48of U-shaped cross section which supports a transparent lens 50 made ofglass or other suitable material. A hinge 52 retains the lens door 20captive on the reflector and a plurality of circumferentially disposedover-center toggle clamps 54 are used to urge a door gasket 56 againstthe S-shaped lip 10b.

The floodlight assembly is rotatably mounted upon the U-shaped bracket14 and a suitable aiming and locking mechanism 58 is provided forallowing the reflector to be moved out of its aimed position forservicing and to be relocated quickly and accurately in its aimedposition. This mechanism is the subject of my copending application Ser.No. 634,192, filed Apr. 27, 1967, entitled Floodlight Aiming and LockingMechanism, and assigned to the same assignee as the present application.In order to insure that the reflector 10 is properly aimed as indicatedby the indicia 60 formed on the trunnion 12 it is of the utmostimportance that the reflector 10 be correctly positioned relative to thering 12. T this end, I have provided a novel arrangement for permanentlysecuring the complex reflective surface relative to the light source ina manner which is both inexpensive and accurate.

It should be understood that the present disclosure has been made onlyby way of example and that numerous changes in details of constructionand the combination and arrangement of parts may be resorted to withoutdeparting from the true spirit and the scope of the invention ashereinafter claimed.

What I claim as new and desire to secure by Letters Patent of the UnitedStates is:

1. An improved floodlight reflector assembly comprising: support means;a trunnion ring carried by said support means; aiming means forselectively angularly positioning said trunnion ring relative to saidsupport means; means carried by said trunnion ring for supporting alight source; a reflector permanently secured to said trunnion ring forbeing accurately aimed in response to the selective positioning of saidtrunnion ring; and means for interlocking said reflector and trunnionring to prevent relative rotation thereof.

2. An improved floodlight reflector assembly comprising: support means;a trunnion ring carried by said support means and including an inwardlyextending circumferential flange terminating in an annular lip extendingaxially away from said flange; aiming means for selectively angularlypositioning said trunnion ring relative to said support means; meanscarried by said trunnion ring for supporting a light source; and areflector including a coupling section mating with said trunnion ring,said coupling section having a complementary inwardly extendingcircumferential flange terminating in an axially extending collar whichis formed over said lip, permanently coupling said reflector and saidtrunnion ring.

3. An improved floodlight reflector assembly comprising: support means;a trunnion ring carried by said support means and including an inwardlyextending circumferential flange having an aperture formed therein;aiming means for selectively angularly positioning said trunnion ringrelative to said support means; means carried by said trunnion ring forsupporting a light source; and a reflector permanently secured to saidtrunnion ring including a coupling section having a complementaryinwardly extending circumferential flange having a formation thereon forentering said aperture for positioning said reflector and said trunnionring when mated, said reflector being accurately aimed in response tothe selective positioning of said trunnion ring.

4. An improved floodlight reflector assembly comprising: support means;a trunnion ring carried by said support means and including an inwardlyextending circumferential flange having an aperture formed therein andterminating in an annular lip; aiming means for selectively angularlypositioning said trunnion ring relative to said support means; meanscarried by said trunnion ring for supporting a light source; and areflector including a coupling section mating with said trunnion ring,said coupling section having a complementary inwardly extendingcircumferential flange having a formation thereon for entering saidaperture and terminating in an axially extending collar which is formedover said lip, for positioning and permanently coupling said reflectorrelative to said trunnion ring, said reflector being accurately aimed inresponse to the selective positioning of said trunnion ring.

References Cited UNITED STATES PATENTS 11/1952 Foulds 240-3 6/1957Cooper 2403 US. Cl. X.R. 240-25

